﻿using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WindowsFormsApp1
{
    public class DbHelper
    {
       public static readonly string conString = "server=.;database=User1;uid=sa;pwd=123456;";
        public static DataTable GetDataTable(string sql)
        {
           
            SqlConnection connection = new SqlConnection(conString);
            SqlDataAdapter adapter = new SqlDataAdapter(sql,connection);
            connection.Open();
            DataTable dt = new DataTable();
            adapter.Fill(dt);
            return dt;
        }
        public static int AddOrUpdate(string sql)
        {
            SqlConnection connection = new SqlConnection(conString);
            SqlCommand command = new SqlCommand(sql, connection);
            connection.Open();
            return command.ExecuteNonQuery();
        }
    }
}
